CN111427472A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111427472A CN111427472A CN202010170389.XA CN202010170389A CN111427472A CN 111427472 A CN111427472 A CN 111427472A CN 202010170389 A CN202010170389 A CN 202010170389A CN 111427472 A CN111427472 A CN 111427472A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a display panel and a display device, which relate to the technical field of display and comprise display areas, wherein each display area comprises a first display area and at least one second display area, and the area of any one second display area is smaller than that of the first display area; the display panel further comprises a substrate, a plurality of first touch electrodes and a plurality of second touch electrodes, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are arranged on one side of the substrate, and the first touch electrodes and the second touch electrodes are insulated from each other; in the first display area, the first touch electrode and the second touch electrode are arranged in the same layer; in the second display area, the first touch electrode and the second touch electrode are arranged in different layers. The design is favorable for improving the touch performance of the second display area.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the development of science and technology, the use of touch display devices has become more and more widespread. The touch panel on the touch display device is provided with a touch integrated circuit, a plurality of touch driving electrodes and a plurality of touch sensing electrodes. The touch integrated circuit provides a driving signal to the touch driving electrode through the touch driving line, the touch sensing electrode and the touch driving electrode form a coupling capacitor, so that the touch sensing electrode generates a sensing signal, and the touch sensing electrode sends the generated sensing signal to the touch integrated circuit through the touch sensing line. After a user touches the touch panel, capacitance is generated between the touch main body and the touch sensing electrode, and coupling capacitance between the touch driving electrode and the touch sensing electrode is reduced, so that signals received by the touch sensing electrode are changed, and the touch integrated circuit can determine the position of touch operation according to the changed signals, so that corresponding touch operation is realized.
With the application of display technology in intelligent wearing and other portable electronic devices, the appearance of the display panel has diversified requirements, and a special-shaped display panel appears. Compared with the conventional display panel, the special-shaped display panel is mainly different in that the display area of the special-shaped display panel is in a non-rectangular special shape, such as a circle, a ring, a diamond and the like.
In the prior art, the plurality of touch driving electrodes and the plurality of touch sensing electrodes are usually located on the same metal layer, and when a display panel has an irregular display area (the irregular display area refers to a non-rectangular special display area), the actual touch area of the irregular display area is small, which may cause the coupling capacitance between the touch driving electrodes and the touch sensing electrodes to be reduced, thereby greatly reducing the touch performance of the area.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, in which the first touch electrode and the second touch electrode of the second display area are disposed in different layers, which is beneficial to improving the touch performance of the second display area and improving the user experience effect.
In a first aspect, the present application provides a display panel, including a display area, where the display area includes a first display area and at least one second display area, where an area of any one of the second display areas is smaller than an area of the first display area;
the display panel further comprises a substrate, a plurality of first touch electrodes and a plurality of second touch electrodes, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are arranged on one side of the substrate, and the first touch electrodes and the second touch electrodes are insulated from each other; in the first display area, the first touch electrode and the second touch electrode are arranged in the same layer; in the second display area, the first touch electrode and the second touch electrode are arranged in different layers.
In a second aspect, the present application provides a display device including the display panel provided by the present application.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
in the display panel and the display device provided by the application, the display area comprises a first display area and a second display area with an area smaller than that of the first display area, and the first display area and the second display area are both provided with a first touch electrode and a second touch electrode, so that the whole display area has a touch function. Particularly, in the first display area with a larger area, the first touch electrode and the second touch electrode are arranged on the same layer, so that the touch performance of the first display area can be ensured, and the production yield of products can be improved. And in the second display area with a smaller area, the first touch electrode and the second touch electrode are arranged in different layers, and the different layer arrangement mode is favorable for reducing the distance between the first touch electrode and the second touch electrode in the direction parallel to the light-emitting surface of the display panel, so that the coupling capacitance between the first touch electrode and the second touch electrode is favorably improved, the touch performance of the second display area is favorably improved, and the use experience effect of a user is favorably improved.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a top view of a display panel according to an embodiment of the present disclosure;
FIG. 2 is an enlarged partial view of a portion of the first display area of FIG. 1 and a second display area adjacent to the portion of the first display area;
FIG. 3 is an AA' cross-sectional view of the first touch electrode and the second touch electrode in the first display area of FIG. 2;
FIG. 4 is a cross-sectional view of a BB' of the first touch electrode and the second touch electrode in the second display area of FIG. 2;
fig. 5 is a top view of another display panel provided in the embodiment of the present application;
FIG. 6 is an enlarged partial view of the second display area and a portion of the first display area adjacent to the second display area of FIG. 5;
FIG. 7 is a sectional view of an FF' of the second display area of FIG. 6;
FIG. 8 is a schematic view of coupling capacitance between the first touch electrode and the second touch electrode;
FIG. 9 is a cross-sectional view of another BB' of the first touch electrode and the second touch electrode in the second display area of FIG. 2;
FIG. 10 is a cross-sectional view of another BB' of the first touch electrode and the second touch electrode in the second display area of FIG. 2;
fig. 11 is a schematic layout view of a first touch electrode and a second touch electrode in a first display area of a display panel according to an embodiment of the present disclosure;
FIG. 12 is a cross-sectional view of the first touch electrode of FIG. 11 at CC';
FIG. 13 is a DD' cross-sectional view of the second touch electrode of FIG. 11;
fig. 14 is a schematic plan view of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the prior art, the plurality of touch driving electrodes and the plurality of touch sensing electrodes are usually located on the same metal layer, and when a display panel has an irregular display area (the irregular display area refers to a non-rectangular special display area), the actual touch area of the irregular display area is small, which may cause the coupling capacitance between the touch driving electrodes and the touch sensing electrodes to be reduced, thereby greatly reducing the touch performance of the area.
In view of this, the present invention provides a display panel and a display device, in which the first touch electrode and the second touch electrode of the second display area are disposed in different layers, which is beneficial to improving the touch performance of the second display area and improving the user experience effect.
The following detailed description is to be read in connection with the drawings and the detailed description.
Fig. 1 is a top view of a display panel according to an embodiment of the present disclosure, fig. 2 is a partial enlarged view of a portion of a first display region and a second display region adjacent to the portion of the first display region in fig. 1, fig. 3 is a cross-sectional view AA 'of a first touch electrode and a second touch electrode in the first display region in fig. 2, fig. 4 is a cross-sectional view BB' of the first touch electrode and the second touch electrode in the second display region in fig. 2, please refer to fig. 1 to fig. 4, a display panel 100 provided in the present disclosure includes a display region 10, the display region 10 includes a first display region 11 and at least one second display region 12, wherein an area of any one of the second display regions 12 is smaller than an area of the first display region 11;
the display panel 100 further includes a substrate 15, and a plurality of first touch electrodes 20 and a plurality of second touch electrodes 30 disposed on one side of the substrate 15, the first touch electrodes 20 and the second touch electrodes 30 being insulated from each other; in the first display area 11, the first touch electrode 20 and the second touch electrode 30 are disposed on the same layer; in the second display area 12, the first touch electrode 20 and the second touch electrode 30 are disposed in different layers.
It should be noted that the second display area 12 in fig. 1 includes at least one arc-shaped edge, the second display area 12 is located at the upper left corner, the upper right corner, the lower left corner and the lower right corner of the display area 10, and the area of the second display area 12 is much smaller than the area of the first display area 11, it is understood that fig. 1 only illustrates the shape, number and size of the second display area 12, and does not limit the shape, number and size of the second display area 12. In some other embodiments of the present application, the second display area 12 may also be located at other positions, for example, please refer to fig. 5, and fig. 5 shows another top view of the display panel 100 provided in this embodiment of the present application, in this embodiment, the second display area 12 is surrounded by the first display area 11, a light transmittance of the second display area 12 is greater than a light transmittance of the first display area 11, the second display area 12 is used for placing a camera, and meanwhile, the second display area 12 is further provided with pixels and touch electrodes, so that the second display area 12 can perform both display and touch control and implement a photographing function, and the provision of the second display area 12 is favorable for increasing a screen ratio of the display panel 100.
Fig. 6 is a partially enlarged schematic view of the second display area in fig. 5 and a portion of the first display area adjacent to the second display area, where the arrangement density of the first touch electrodes 20 and the second touch electrodes 30 in the second display area 12 is less than the arrangement density of the first touch electrodes 20 and the second touch electrodes 30 in the first display area 11, so as to facilitate improvement of the light transmittance of the second display area 12. Specifically, in fig. 6, the area of the orthographic projection of the first touch electrode 20 located in the second display area 12 on the substrate is smaller than the area of the orthographic projection of the first touch electrode 20 located in the first display area 11 on the substrate, and similarly, the area of the orthographic projection of the second touch electrode 30 located in the second display area 12 on the substrate is smaller than the surface of the orthographic projection of the second touch electrode 30 located in the first display area 11 on the substrate. Of course, in some other embodiments of the present application, when the touch electrodes are embodied as a grid structure, in order to increase the transmittance of the second display area, the size of the corresponding grid in the second display area may be designed to be larger than the size of the corresponding grid in the first display area, so that the distribution density of the touch electrodes in the second display area is smaller than the distribution density of the touch electrodes in the first display area.
It should be noted that fig. 3 and 4 only show a part of the film structure of the display panel 100, and do not represent the actual film structure of the display panel 100. Optionally, the display panel 100 provided in the present application includes an array layer, a light emitting layer, an encapsulation layer, and a touch layer, which are sequentially disposed on the substrate 15 along a direction perpendicular to the plane of the substrate 15, and the array layer, the light emitting layer, and the encapsulation layer are not shown in detail in the figure, and the first touch electrode 20 and the second touch electrode 30 mentioned in the present application are located in the touch layer.
Specifically, with reference to fig. 1 to 4, in the display panel 100 provided in the present application, the display area 10 includes a first display area 11 and a second display area 12 having a smaller area than the first display area 11, and the first touch electrode 20 and the second touch electrode 30 are disposed in both the first display area 11 and the second display area 12, so that the entire display area 10 has a touch function. Particularly, in the first display area 11 with a larger area, please refer to fig. 3, the first touch electrode 20 and the second touch electrode 30 are disposed on the same layer, so that the touch performance of the first display area 11 can be ensured, and the production yield of the product can be improved. In the second display area 12 with a smaller area, please refer to fig. 4, the first touch electrode 20 and the second touch electrode 30 are disposed in different layers, and the different layer disposing is favorable for reducing the distance between the first touch electrode 20 and the second touch electrode 30 in the direction parallel to the light exit surface of the display panel 100, so as to be favorable for improving the coupling capacitance between the first touch electrode 20 and the second touch electrode 30, when the touch main body touches the display panel, the touch main body forms a coupling capacitance with the first touch electrode 29 and the second touch electrode 30, and the introduction of the coupling capacitance changes (specifically, reduces) the coupling capacitance between the first touch electrode 20 and the second touch electrode 30. The first touch electrode 20 and the second touch electrode 30 are arranged in different layers in the second display area 12, so that the coupling capacitance of the first touch electrode 20 and the second touch electrode 30 is increased, and when a touch main body touches the display panel, the variation of the coupling capacitance between the first touch electrode 20 and the second touch electrode 30 is more obvious, so that the touch sensitivity of the second display area 12 is improved, and the use experience effect of a user is improved.
In an alternative embodiment of the present invention, please refer to fig. 4 and 7, wherein fig. 7 is a cross-sectional view of an FF' of the second display area in fig. 6, and fig. 7 shows an electric field between the first touch electrode and the second touch electrode in the first display area and the second display area; in the second display area 12, the first touch electrode 20 is located between the second touch electrode 30 and the substrate 15 along a direction perpendicular to the plane of the substrate 15, and the first touch electrode 20 and the second touch electrode 30 are isolated by the first insulating layer 41.
Specifically, with continued reference to fig. 4 and fig. 7, when the first touch electrode 20 and the second touch electrode 30 are disposed in different layers in the second display area 12, the first touch electrode 20 and the second touch electrode 30 are isolated by the first insulating layer 41. In the touch stage, electric field lines are formed between the first touch electrode 20 and the second touch electrode 30, the number of the electric field lines is proportional to the coupling capacitance between the first touch electrode 20 and the second touch electrode 30, the larger the coupling capacitance between the first touch electrode 20 and the second touch electrode 30 is, the denser the electric field lines between the first touch electrode and the second touch electrode are, and the coupling capacitance between the first touch electrode and the second touch electrode can be seen in fig. 8, which is a schematic diagram of the coupling capacitance between the first touch electrode and the second touch electrode. When a touch occurs, a capacitance is formed between the touch main body and the first touch electrode 20 and the second touch electrode 30, the capacitance reduces the number of electric field lines between the first touch electrode 20 and the second touch electrode 30, that is, the coupling capacitance between the first touch electrode 20 and the second touch electrode 30 is reduced, and the touch position can be known according to the variation condition of the coupling capacitance between the first touch electrode 20 and the second touch electrode 30. When the first touch electrode 20 and the second touch electrode 30 are disposed on different layers, the distance between the first touch electrode 20 and the second touch electrode 30 along the first direction is reduced, so that the coupling capacitance between the first touch electrode 20 and the second touch electrode 30 is improved. When a touch operation occurs, the amount of variation of the coupling capacitance between the first touch electrode 20 and the second touch electrode 30 is more significant, which is beneficial to improving the touch performance of the display panel 100.
In an alternative embodiment of the present invention, the first touch electrode 20 is a touch driving electrode, and the second touch electrode 30 is a touch sensing electrode.
Specifically, with continued reference to fig. 4 and fig. 7, the second touch electrode 30 is located on a side of the first touch electrode 20 away from the substrate 15, that is, the touch sensing electrode is located on a side of the touch driving electrode away from the substrate 15, and in a touch stage of the display panel 100, when a touch subject touches the display panel 100, a coupling capacitance is formed between the touch subject and the touch sensing electrode, which results in a decrease in a coupling capacitance between the touch driving electrode and the touch sensing electrode, and the touch sensing electrode transmits a variation of the coupling capacitance to the touch driving chip. That is to say, in the touch process, the touch sensing electrode is used for receiving the touch sensing signal, when the touch sensing electrode is disposed on one side of the touch driving electrode close to the touch main body, it is beneficial to reduce the vertical distance between the touch sensing electrode and the touch main body, and when the touch main body touches the display panel 100, the signal strength of the coupling capacitance between the touch main body and the touch sensing electrode is greater, so that the variation of the coupling capacitance between the touch sensing electrode and the touch driving electrode is greater, and therefore, it is more beneficial to improve the touch sensitivity.
In an optional embodiment of the present invention, in the second display area 12, the first touch electrode 20 includes a plurality of first metal traces 25, the second touch electrode 30 includes a plurality of second metal traces 35, and orthographic projections of the first metal traces 25 and the second metal traces 35 on the plane of the substrate base plate 15 are not overlapped with each other.
Specifically, please refer to fig. 4, in the second display area 12, the orthographic projections of the first metal traces 25 included in the first touch electrodes 20 and the second metal traces 35 included in the second touch electrodes 30 onto the substrate 15 are not overlapped with each other, so that a coupling capacitance is formed in the non-overlapped area of the first metal traces 25 and the second metal traces 35, and along the first direction, except for the first metal traces 25 and the second metal traces 35 located in the edge area, the other first metal traces 25 are adjacent to the two second metal traces 35, which is equivalent to reduce the distance between the first metal traces 25 and the second metal traces 35 compared with the way of arranging the touch driving electrodes and the touch sensing electrodes at the same layer in the prior art, thereby being beneficial to increasing the coupling capacitance between the touch sensing electrodes and the touch driving electrodes. When the touch subject touches the display panel 100, the amount of change in the coupling capacitance between the touch sensing electrode and the touch driving electrode due to the touch of the touch subject is larger, which is more favorable for improving the touch sensitivity of the display panel 100.
In an alternative embodiment of the present invention, in the second display area 12, the plurality of first metal traces 25 form a first grid structure, and the plurality of second metal traces 35 form a second grid structure.
Specifically, since the second display area 12 is provided with a plurality of pixels, when the first touch electrode 20 of the second display area 12 is set to be the first grid-shaped structure formed by the plurality of first metal traces 25 and the second touch electrode 30 is set to be the second grid-shaped structure formed by the plurality of second metal traces 35, the orthographic projection of the grid-shaped structure on the plane where the substrate base plate 15 is located can be set in the non-opening area around the pixels, so as to prevent the first metal traces 25 and the second metal traces 35 from shielding the pixels and reducing the aperture ratio of the display panel 100.
It should be noted that fig. 4 only shows one form that the orthographic projections of the first metal traces 25 and the second metal traces 35 on the substrate 15 do not overlap each other, in some other embodiments of the present invention, the orthographic projections of the first metal traces 25 and the second metal traces 35 on the substrate 15 may also partially overlap, for example, please refer to fig. 9, fig. 9 shows another BB' cross-sectional view of the first touch electrodes 20 and the second touch electrodes 30 located in the second display area 12 in fig. 2, when the first metal traces 25 and the second metal traces 35 partially overlap on the orthographic projection of the substrate 15, so that a coupling capacitance may also be formed in an area where the first metal traces 25 and the second metal traces 35 do not overlap, and therefore, the traces along the first direction between the adjacent first metal traces 25 and the second metal traces 35 are also favorably reduced, and the coupling capacitance strength between the touch driving electrodes and the touch sensing electrodes is improved, it is also beneficial to improve the touch sensitivity of the display panel 100.
In an alternative embodiment of the invention, referring to fig. 10, fig. 10 is a cross-sectional view of another BB' of the first touch electrode 20 and the second touch electrode 30 located in the second display area 12 in fig. 2, where in the second display area 12, the first touch electrode 20 is a planar structure, and the second touch electrode 30 includes a plurality of second metal traces 35.
With reference to fig. 10, in addition to being disposed as a mesh structure, the first touch electrode 20 in the present application may also be embodied as a planar structure as shown in fig. 10, in which case, electric field lines formed by interaction between the first touch electrode 20 and the second touch electrode 30 will pass through an area between adjacent second touch electrodes 30, so as to form a coupling capacitance, which is also beneficial to reduce a distance between the first touch electrode 20 and the second touch electrode 30, and enhance the strength of the coupling capacitance between the first touch electrode 20 and the second touch electrode 30, thereby also being beneficial to improve the touch sensitivity of the display panel 100.
In the embodiment shown in fig. 10, in the second display area 12, a plurality of second metal traces 35 form a second grid structure. Since the plurality of pixels are disposed in the second display area 12, when the second touch electrode 30 is set as the second grid structure formed by the plurality of second metal traces 35, the orthographic projection of the grid structure on the plane of the substrate can be disposed in the non-opening area around the pixels, so as to prevent the second metal traces 35 from shielding the pixels and reducing the aperture ratio of the display panel 100. It should be noted that, when the first touch electrode 20 is configured as a planar structure, the first touch electrode 20 may be formed by a transparent material, such as ITO, so that it is also beneficial to avoid affecting the aperture ratio of the second display area 12.
In an alternative embodiment of the present invention, please refer to fig. 11, fig. 11 is a schematic layout diagram of the first touch electrode 20 and the second touch electrode 30 located in the first display area 11 in the display panel 100 according to the embodiment of the present application, where: the first touch electrode 20 includes a plurality of first touch sub-units 21 electrically connected to each other, and the second touch electrode 30 includes a plurality of second touch sub-units 31 electrically connected to each other;
in the same first touch electrode 20, at least a part of the first touch subunits 21 are electrically connected through a first bridging metal trace 22; in the same second touch electrode 30, the adjacent second touch subunits 31 are electrically connected through the first connecting metal trace 33; the first bridging metal trace 22 and the first touch electrode 20 are disposed in different layers, and the first connecting metal trace 33 and the second touch electrode 30 are disposed in the same layer;
or, in the same second touch electrode 30, at least a part of the second touch subunits 31 are electrically connected through the second bridging metal trace 32; in the same first touch electrode 20, adjacent first touch subunits 21 are electrically connected through a second connecting metal trace 23; the second bridging metal trace 32 and the second touch subunit 31 are disposed in different layers, and the second connecting metal trace 23 and the first touch electrode 20 are disposed in the same layer.
Referring to fig. 11, in the first display area 11, the first touch electrode 20 and the second touch electrode 30 are disposed in the same layer and insulated from each other, each first touch sub-unit 21 in the same first touch electrode 20 is arranged along the third direction, and any two adjacent first touch sub-units 21 are electrically connected, in the present application, a bridging metal layer is introduced into the display panel 100, please refer to fig. 12, fig. 12 is a CC' cross-sectional view of the first touch electrode 20 in fig. 11, a first bridging metal trace 22 is disposed on the bridging metal layer, and the first bridging metal trace 22 is used to achieve electrical connection between adjacent first touch sub-units 21. Since the first bridging metal trace 22 and the first touch subunit 21 are disposed in different layers, the first bridging metal trace 22 and the first touch subunit 21 are electrically connected through the via hole. In the same second touch electrode 30, the adjacent second touch subunits 31 are electrically connected through the first connecting metal trace 33 disposed on the same layer, and there is no need to separately dispose another bridging metal layer for the electrical connection between the second touch subunits, thereby facilitating the realization of the thin design of the display panel. In the direction perpendicular to the substrate base plate, a coupling capacitance will also be formed between the first connecting metal trace 33 and the first bridging metal trace 22.
In another embodiment of the present invention, please refer to fig. 11 and 13, in which the second touch sub-units 31 in the same second touch electrode 30 are arranged along the second direction, and two adjacent second touch sub-units 31 in the same second touch electrode 30 are electrically connected, referring to fig. 13, fig. 13 is a DD' cross-sectional view of the second touch electrode 30 in fig. 11, wherein a second bridging metal trace 32 is disposed on the bridging metal layer, and the second bridging metal trace 32 is used to electrically connect the adjacent second touch sub-units 31. Since the second bridging metal trace 32 and the second touch subunit 31 are disposed in different layers, the second bridging metal trace 32 and the second touch subunit 31 are electrically connected through a via. In the same first touch electrode 20, the adjacent first touch subunits 21 are electrically connected through the second connecting metal trace 23 disposed on the same layer as the adjacent first touch subunits, and there is no need to separately provide another bridging metal layer for the electrical connection between the second touch subunits, thereby facilitating the realization of the thin design of the display panel. In the direction perpendicular to the substrate base plate, a coupling capacitance will also be formed between the second connecting metal trace 23 and the second bridging metal trace 32.
In an alternative embodiment of the invention, please refer to fig. 3 and fig. 4, in the first display area 11, the first bridging metal trace 22 is separated from the first touch electrode 20 by the second insulating layer 42; the maximum thickness D1 of the first insulating layer 41 is smaller than the maximum thickness D2 of the second insulating layer 42 in a direction perpendicular to the plane of the base substrate 15.
Specifically, with continued reference to fig. 2, fig. 3 and fig. 4, in the second display region 12 with a smaller area, the first touch electrode 20 and the second touch electrode 30 are disposed in different layers, and are separated by the first insulating layer 41; in the first display area 11 with a larger area, the first bridging metal trace 22 is isolated from the first touch electrode 20 by the second insulating layer 42. The maximum thickness D1 of the first insulating layer 41 is designed to be smaller than the maximum thickness D2 of the second insulating layer 42, which is equivalent to the vertical distance between the first touch electrode 20 and the second touch electrode 30 in the thinned second display area 12, where the vertical distance refers to the distance in the direction perpendicular to the plane of the substrate base plate 15; when the distance between the first touch electrode 20 and the second touch electrode 30 is decreased, the coupling capacitance between the first touch electrode 20 and the second touch electrode 30 is increased accordingly, and therefore, the touch sensitivity of the second display area 12 is also improved by the thickness difference design of the first insulating layer 41 and the second insulating layer 42, and the touch experience effect of the user is improved.
When the second display area 12 is a semi-transparent display area in the present application, the light transmittance of the second display area 12 is greater than that of the first display area 11, for example, referring to fig. 6, in the same unit area, the area of the first touch electrode 20 located in the second display area 12 is smaller than that of the first touch electrode 20 located in the first display area 11; or, in the same unit area, the area of the second touch electrode 30 located in the second display area 12 is smaller than the area of the second touch electrode 30 located in the first display area 11.
Specifically, in the semi-transmissive display region, the area of the first touch electrode 20 disposed in each unit area is set to be smaller than the area of the first touch electrode 20 disposed in the first display region 11, so that the occupation ratio of the first touch electrode 20 in the semi-transmissive display region is favorably reduced, and the transmittance of the semi-transmissive display region is favorably improved. Similarly, in the semi-transparent display area, the area of the second touch electrode 30 disposed in each unit area is set to be smaller than the area of the second touch electrode 30 disposed in the first display area 11, which is also beneficial to reducing the ratio of the second touch electrode 30 in the semi-transparent display area, and thus is beneficial to improving the transmittance of the semi-transparent display area. When the transmissivity of the semi-transparent area is improved and the camera is arranged in the semi-transparent display area, the semi-transparent display area with higher transmissivity is beneficial to improving the image quality of the image shot by the camera in the image shooting stage.
Based on the same inventive concept, the present application further provides a display device including the display panel in any of the above embodiments of the present application.
Referring to fig. 14, fig. 14 is a schematic plan view of a display device according to the present invention. Fig. 14 provides a display device 200 including a display panel 100, wherein the touch display panel is the touch display panel 100 according to any of the above embodiments of the present invention. The embodiment of fig. 14 is only an example of a mobile phone, and the display device 200 is described, it is understood that the display device provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
In summary, the display panel and the display device provided by the invention at least achieve the following beneficial effects:
in the display panel and the display device provided by the application, the display area comprises a first display area and a second display area with an area smaller than that of the first display area, and the first display area and the second display area are both provided with a first touch electrode and a second touch electrode, so that the whole display area has a touch function. Particularly, in the first display area with a larger area, the first touch electrode and the second touch electrode are arranged on the same layer, so that the touch performance of the first display area can be ensured, and the production yield of products can be improved. And in the second display area with a smaller area, the first touch electrode and the second touch electrode are arranged in different layers, and the different layer arrangement mode is favorable for reducing the distance between the first touch electrode and the second touch electrode in the direction parallel to the light-emitting surface of the display panel, so that the coupling capacitance between the first touch electrode and the second touch electrode is favorably improved, the touch performance of the second display area is favorably improved, and the use experience effect of a user is favorably improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (13)
1. A display panel is characterized by comprising a display area, wherein the display area comprises a first display area and at least one second display area, and the area of any one second display area is smaller than that of the first display area;
the display panel further comprises a substrate, a plurality of first touch electrodes and a plurality of second touch electrodes, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are arranged on one side of the substrate, and the first touch electrodes and the second touch electrodes are insulated from each other; in the first display area, the first touch electrode and the second touch electrode are arranged in the same layer; in the second display area, the first touch electrode and the second touch electrode are arranged in different layers.
2. The display panel according to claim 1, wherein in the second display region, the first touch electrode is located between the second touch electrode and the substrate in a direction perpendicular to a plane of the substrate, and the first touch electrode and the second touch electrode are separated by a first insulating layer.
3. The display panel according to claim 2, wherein the first touch electrode is a touch driving electrode, and the second touch electrode is a touch sensing electrode.
4. The display panel according to claim 2, wherein the first touch electrode includes a plurality of first metal traces, the second touch electrode includes a plurality of second metal traces, and orthographic projections of the first metal traces and the second metal traces on a plane of the substrate base plate are not overlapped with each other.
5. The display panel according to claim 4, wherein the plurality of first metal traces form a first grid structure, and the plurality of second metal traces form a second grid structure.
6. The display panel according to claim 2, wherein the first touch electrode is a planar structure, and the second touch electrode includes a plurality of second metal traces.
7. The display panel according to claim 6, wherein the plurality of second metal traces form a second grid structure.
8. The display panel according to claim 1, wherein in the first display region: the first touch electrode comprises a plurality of first touch subunits electrically connected with each other, and the second touch electrode comprises a plurality of second touch subunits electrically connected with each other;
in the same first touch electrode, at least part of the first touch subunits are electrically connected through a first bridging metal wire; in the same second touch electrode, adjacent second touch subunits are electrically connected through a first connecting metal wire; the first bridging metal wire and the first touch electrode are arranged in different layers, and the first bridging metal wire and the second touch electrode are arranged in the same layer;
or, in the same second touch electrode, at least part of the second touch subunits are electrically connected through a second bridging metal wire; in the same first touch electrode, adjacent first touch subunits are electrically connected through a second connecting metal wire; the second bridging metal wire and the second touch subunit are arranged in different layers, and the second bridging metal wire and the first touch electrode are arranged in the same layer.
9. The display panel according to claim 8, wherein in the first display area, the first bridging metal trace is separated from the first touch electrode by a second insulating layer;
the maximum thickness of the first insulating layer is smaller than that of the second insulating layer along the direction perpendicular to the plane of the substrate base plate.
10. The display panel according to claim 1, wherein a light transmittance of the second display region is greater than a light transmittance of the first display region.
11. The display panel according to claim 10, wherein the area of the first touch electrode in the second display region is smaller than the area of the first touch electrode in the first display region in the same unit area;
or, in the same unit area, the area of the second touch electrode located in the second display area is smaller than the area of the second touch electrode located in the first display area.
12. The display panel of claim 1, wherein the second display region comprises at least one curved edge.
13. A display device comprising the display panel according to any one of claims 1 to 12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010170389.XA CN111427472A (en) | 2020-03-12 | 2020-03-12 | Display panel and display device |
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| CN202010170389.XA CN111427472A (en) | 2020-03-12 | 2020-03-12 | Display panel and display device |
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| CN111427472A true CN111427472A (en) | 2020-07-17 |
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| CN111984153A (en) * | 2020-08-31 | 2020-11-24 | 武汉天马微电子有限公司 | Display panel and display device |
| CN112817487A (en) * | 2021-02-26 | 2021-05-18 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN113093952A (en) * | 2021-04-30 | 2021-07-09 | 合肥维信诺科技有限公司 | Touch display panel and touch display device |
| CN113794791A (en) * | 2021-09-15 | 2021-12-14 | 合肥维信诺科技有限公司 | Display module and display device |
| CN114371792A (en) * | 2021-12-21 | 2022-04-19 | 云谷（固安）科技有限公司 | Touch substrate, touch substrate preparation method and display device |
| TWI783668B (en) * | 2021-09-03 | 2022-11-11 | 友達光電股份有限公司 | Touch panel and manufacturing method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111984153A (en) * | 2020-08-31 | 2020-11-24 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111984153B (en) * | 2020-08-31 | 2022-04-08 | 武汉天马微电子有限公司 | Display panel and display device |
| CN112817487A (en) * | 2021-02-26 | 2021-05-18 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN113093952A (en) * | 2021-04-30 | 2021-07-09 | 合肥维信诺科技有限公司 | Touch display panel and touch display device |
| CN113093952B (en) * | 2021-04-30 | 2023-11-07 | 合肥维信诺科技有限公司 | Touch display panel and touch display device |
| TWI783668B (en) * | 2021-09-03 | 2022-11-11 | 友達光電股份有限公司 | Touch panel and manufacturing method thereof |
| CN113794791A (en) * | 2021-09-15 | 2021-12-14 | 合肥维信诺科技有限公司 | Display module and display device |
| CN114371792A (en) * | 2021-12-21 | 2022-04-19 | 云谷（固安）科技有限公司 | Touch substrate, touch substrate preparation method and display device |
| CN114371792B (en) * | 2021-12-21 | 2024-01-19 | 云谷（固安）科技有限公司 | Touch substrate, touch substrate preparation method and display device |
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